Improved microwave absorption properties of TiO2 and Ni0.53Cu0.12Zn0.35Fe2O4 nanocomposites potential for microwave devices

摘要

Nanostructured xTiO(2) (1-x) Ni(0.53)Cu(0.12)Zn(0.35)Ee(2)O(4) nanocomposites (where 0 <= x <= 1) were prepared by a low temperature microwave-hydrothermal (M-H) method at 165 degrees C145 min. Microwave sintering (MS) technology has been applied in the preparation of nanocomposites. Several kinds of such systems have been fabricated by MS technology. The sintering time and temperature were reduced from 22 h to 1100 degrees C for conventional sintering process to 30 min and 500 degrees C for MS process, respectively. The addition of TiO2 to Ni0.53Cu0.12Zn0.35 ferrite increased the dielectric properties (epsilon' and epsilon ''). The imaginary part of permeability (mu '') was found to increase with an increase of TiO2. The complex permittivity and permeability were collected by the vector network analyser and the absorbing properties were calculated according to transmission theory. The absorption peak shifted to higher frequencies with the substitution. The highest reflection coefficient value of -28 dB at 10.26 GHz was observed for the x = 0.5 sample. The microwave absorption band width of -10 dB with xTiO(2) (1-x) Ni0.53Cu0.53Zn0.35Fe2O4 nano composites is effectively broadened compared with other ferrites. Based on the magnetic and microwave measurements xTiO(2)+(1-x) Ni0.53Cu0.12Zn0.35Fe2O4 may be a good candidate for electromagnetic materials and other practical applications like military and civil applications. (C) 2016 Elsevier B.V. All rights reserved.